ScienceClass 9CBSE
Q
Ozone-hole’ means (a) a large sized hole in the ozone layer (b) thinning of the ozone layer (c) small holes scattered in the ozone layer thickening of ozone in the ozone layer
A
- Soln:
Answer is (b) thinning of the ozone layer
Answer is (b) thinning of the ozone layer